document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=145984>Question 145984</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let's say I know the average height of 30 students is 158cm. And then a new  student is added who is 147cm. Can I recalculate the average without knowing each of the previous student's height?  \r<BR>\n" );
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document.write( "Many thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #106541 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=106541\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's say I know the average height of 30 students is 158cm. And then a new student is added who is 147cm. Can I recalculate the average without knowing each of the previous student's height? <BR>\n" );
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document.write( "You could do it this way. Assume all 30 students had a height of 158:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2830%28158%29+%2B+147%29%2F31 ALIGN=MIDDLE  ALT=\"%2830%28158%29+%2B+147%29%2F31\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284740%2B147%29%2F31 ALIGN=MIDDLE  ALT=\"%284740%2B147%29%2F31\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4887%2F31 ALIGN=MIDDLE  ALT=\"4887%2F31\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 157.645 cm </SPAN>\n" );
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